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gspawn: support creating pipes with O_CLOEXEC

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Add a new flag, G_SPAWN_CLOEXEC_PIPES, for creating the stdin/out/err
pipes with O_CLOEXEC (for the usual reasons).

https://bugzilla.gnome.org/show_bug.cgi?id=672102
This commit is contained in:
Ryan Lortie 2012-11-10 13:16:29 -05:00 committed by Colin Walters
parent 292de8cc52
commit 2054ccad95
2 changed files with 15 additions and 27 deletions
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37
glib/gspawn.c
View File

@ -53,7 +53,7 @@
#include "gtestutils.h"
#include "gutils.h"
#include "glibintl.h"
#include "glib-unix.h"
/**
* SECTION:spawn
@ -69,8 +69,6 @@ static gint g_execute (const gchar *file,
gboolean search_path,
gboolean search_path_from_envp);
static gboolean make_pipe (gint p[2],
GError **error);
static gboolean fork_exec_with_pipes (gboolean intermediate_child,
const gchar *working_directory,
gchar **argv,
@ -82,6 +80,7 @@ static gboolean fork_exec_with_pipes (gboolean intermediate_child,
gboolean stderr_to_null,
gboolean child_inherits_stdin,
gboolean file_and_argv_zero,
gboolean cloexec_pipes,
GSpawnChildSetupFunc child_setup,
gpointer user_data,
GPid *child_pid,
@ -312,6 +311,7 @@ g_spawn_sync (const gchar *working_directory,
(flags & G_SPAWN_STDERR_TO_DEV_NULL) != 0,
(flags & G_SPAWN_CHILD_INHERITS_STDIN) != 0,
(flags & G_SPAWN_FILE_AND_ARGV_ZERO) != 0,
(flags & G_SPAWN_CLOEXEC_PIPES) != 0,
child_setup,
user_data,
&pid,
@ -679,6 +679,7 @@ g_spawn_async_with_pipes (const gchar *working_directory,
(flags & G_SPAWN_STDERR_TO_DEV_NULL) != 0,
(flags & G_SPAWN_CHILD_INHERITS_STDIN) != 0,
(flags & G_SPAWN_FILE_AND_ARGV_ZERO) != 0,
(flags & G_SPAWN_CLOEXEC_PIPES) != 0,
child_setup,
user_data,
child_pid,
@ -1311,6 +1312,7 @@ fork_exec_with_pipes (gboolean intermediate_child,
gboolean stderr_to_null,
gboolean child_inherits_stdin,
gboolean file_and_argv_zero,
gboolean cloexec_pipes,
GSpawnChildSetupFunc child_setup,
gpointer user_data,
GPid *child_pid,
@ -1325,21 +1327,22 @@ fork_exec_with_pipes (gboolean intermediate_child,
gint stderr_pipe[2] = { -1, -1 };
gint child_err_report_pipe[2] = { -1, -1 };
gint child_pid_report_pipe[2] = { -1, -1 };
guint pipe_flags = cloexec_pipes ? FD_CLOEXEC : 0;
gint status;
if (!make_pipe (child_err_report_pipe, error))
if (!g_unix_open_pipe (child_err_report_pipe, pipe_flags, error))
return FALSE;
if (intermediate_child && !make_pipe (child_pid_report_pipe, error))
if (intermediate_child && !g_unix_open_pipe (child_pid_report_pipe, pipe_flags, error))
goto cleanup_and_fail;
if (standard_input && !make_pipe (stdin_pipe, error))
if (standard_input && !g_unix_open_pipe (stdin_pipe, pipe_flags, error))
goto cleanup_and_fail;
if (standard_output && !make_pipe (stdout_pipe, error))
if (standard_output && !g_unix_open_pipe (stdout_pipe, pipe_flags, error))
goto cleanup_and_fail;
if (standard_error && !make_pipe (stderr_pipe, error))
if (standard_error && !g_unix_open_pipe (stderr_pipe, FD_CLOEXEC, error))
goto cleanup_and_fail;
pid = fork ();
@ -1623,24 +1626,6 @@ fork_exec_with_pipes (gboolean intermediate_child,
return FALSE;
}
static gboolean
make_pipe (gint p[2],
GError **error)
{
if (pipe (p) < 0)
{
gint errsv = errno;
g_set_error (error,
G_SPAWN_ERROR,
G_SPAWN_ERROR_FAILED,
_("Failed to create pipe for communicating with child process (%s)"),
g_strerror (errsv));
return FALSE;
}
else
return TRUE;
}
/* Based on execvp from GNU C Library */
static void

5
glib/gspawn.h
View File

@ -166,6 +166,8 @@ typedef void (* GSpawnChildSetupFunc) (gpointer user_data);
* @G_SPAWN_SEARCH_PATH_FROM_ENVP: if <literal>argv[0]</literal> is not an abolute path,
* it will be looked for in the <envar>PATH</envar> from the passed child
* environment. Since: 2.34
* @G_SPAWN_CLOEXEC_PIPES: On UNIX, returned pipe file descriptors will have the
* close-on-exec flag set. Since: 2.36
*
* Flags passed to g_spawn_sync(), g_spawn_async() and g_spawn_async_with_pipes().
*/
@ -180,7 +182,8 @@ typedef enum
G_SPAWN_STDERR_TO_DEV_NULL = 1 << 4,
G_SPAWN_CHILD_INHERITS_STDIN = 1 << 5,
G_SPAWN_FILE_AND_ARGV_ZERO = 1 << 6,
G_SPAWN_SEARCH_PATH_FROM_ENVP = 1 << 7
G_SPAWN_SEARCH_PATH_FROM_ENVP = 1 << 7,
G_SPAWN_CLOEXEC_PIPES = 1 << 8
} GSpawnFlags;
GQuark g_spawn_error_quark (void);